Coupling



H. T. LANG Oct. 21, 1941.

COUPLING Filed April 30, 1940 mj a n o t w n b ey /l A A 2W5 Huw rigidmetal suction tube 3.

Patented Oct. 21, 1943 UNITED STATES PATENT OFFICE COUPLING Henry T.Lang, Cleveland, Ohio, assignor to Electric Vacuum Cleaner Company,Inc., Cleveland, Ohio, a corporation of New York Application April 30,1940, Serial No. 332,510

2 Claims;

The present invention relates to swivel couplings for use in vacuumcleaners and the like.

The object of my invention is to provide an improved construction inswivel couplings, and for a consideration of what I believe novel and myinvention, attention is directed to the following description and theclaims appended thereto.

In the accompanying drawing the single figure is a sectional view of acoupling embodying my invention applied to a vacuum cleaner tool.

Referring to the drawing, there is shown a vacuum cleaner toolcomprising a body of molded rubber having a suction nozzle l and anintegral tubular portion '2 connecting the nozzle with a Fixed withinthe suction nozzle is a brush back 4 having a central aperture 5carrying bristles 6 surrounding the aperture, the lower ends of whichproject below the suction nozzle for contact with the surface beingcleaned.

Extending within the tubular portion 2 is a rigid metal sleeve 1 havinganenlarged portion 8 rotatably receiving the end 9 of the suction tube3. A rigid metal sleeve 10 surrounds the outer surface of the tubularportion 2. The walls of the tubular portion 2 are accordingly confinedbetween the inner and outer sleeves I and 10. The outer sleeve I isprovided with an inwardly extending flange H which cooperates with ashoulder formed by a ring l2 secured in a groove l3 in the suction tube3 to prevent removal of the suction tube. A spring washer l4 arrangedbetween the end of the tubular portion 2 and the ring l2 maintains thering in engagement with the flange ll so as to prevent rattling, Thecoupling can be disassembled by sliding the outer sleeve l0 ofi the endof the tubular portion 2.

In the above described construction leakage of air in through thecoupling is prevented by the relatively close fit between the enlargedportion 8 of the sleeve 1 and the end 9 of the suction tube 3. Leakageis also prevented by the engagement of the flange l i with the ring [2.Due to the absence of gaskets or packing the suction tube 3 can beeasily turned relative to the floor tool.

What I claim as new and desire to secure by Letters Patent of, theUnited States, is':

1. A swivel coupling comprising a flexible tube having its wallsconfined between rigid inner and outer sleeves, a rigid tube rotatablytelescoped within the inner sleeve and having an outwardlyextendingshoulder beyond the end of the flexible tube, and an inwardlyextending flange on the outer sleeve cooperating with said shoulder toprevent removal of the rigid tube.

2. A swivel coupling comprising a flexible tube having its wallsconfined between rigid inner and outer sleeves, fastening meansextending through the walls of said tube and cooperating with saidsleeves, a rigid tube rotatably telescoped within said inner sleeve, andrelatively rotatable inter engaging parts on the outer sleeve and saidrigid tube for preventing removal of the rigid tube.

HENRY T. LANG.

